Louis l



L. L. CHAUVEAU CALL SELECTOR Filed Jan. 8. 1923 March 6, 1928.

Elwuqntoz L0 3\.. CHAUVEAU, @513 ms 2 Q Patented Mar. 6, 1928 siren srTss LOUIS L, CHAUVEAU, ()F PARIS,

CALL SELECTOR.

Applicationfiled January 8, 1923, Serial No; 611,537, and'in FranceJanuary 17, 1922.

The present invention relates to a new type of call selector. Thevobject of this apparatus is to cause the actuation of a calling device(bell, etc.)." The apparatus may be a controlled over wires orby meansof wireless telegraphy and is responsive to signalscompoles,'respectively, of a source of electricity,

(battery storage battery, generator, etc.) not shown in the drawing.

1 is a contact which may be closed manually or by means of any-suitablerelay (not shownjcontrolled by a receiver for wireless or wiretelegraphy. This contact 1 controls the circuit of relay 2 in such amanner that said relay is energized upon'each closure of the contact andwhile the contact is closed. In response to each one of these impulsesthe relay 2 is energized through the circuit: from contact 1,'relay 2,contact 33, to

(+) and closes through its contact 6 the cir-.

cult of the controlling relay 8, and the latter being energized, closesits holding contact 9 and thereversing contact 10. As a result of this,upon each closureof contact 1, the re lay 8 is energized fromminus'through contact 6, relay, 8 to plus and locks up through itscontact 9 from the minus connection as sociated with relay 11 throughcontact 26, contact 9, relay 8 to plus. By actuating the contact 10, thecircuit of the normally energized slow-release relay 11 is opened. Thisrelay may be of the slow-release type used in automatic telephony and isadjusted'in such a manner that its normally open contact 12 is closedonly after the expiration of apeceased to be energized if the signalreceived is a dot, but willbe still in energized condition it the signalreceived is a dash. 'The Contact 12 extends the current path to the re-The apparatus is soar-ranged that the riod of time required for a dot.Therefore, when the contact 12 is closed, the relay 2 has versingcontacts 7 whereby, ifthe signalreceived is a dot, current flows throughcon ductor 15, and through conductor 14 if the, signal received is adash. This arrangement constitutes the dot and dash selector.

At the same time that relay 11 allows its contact 12, to close, it opensitscontact 26 which in turn opens the locking circuit of relay 8. Theapparatus is now in condition to select a new signal. It is necessary toarrange for the transfer of the signal, depending on its nature, to itsproper circuit and for this purpose the relay 2 is provided with a setof contacts 40. When the contact 1 is 'openedthe contact 40 is in itsnormal position and closes an energizing circuit from minus to contact40 on the right hand side,

contact 42, relay 41toplus for the relay 41 "which in. turn locks upthrough minus to contact 45, contact 42, relay 41 to plus. The relay 41closes also the contact 43.

When a signal is received theline 46 is connected thru relay 44, contact43 and the contact 40 with the pole of the battery.

Circuit may then be completed thru. the line 46 through one of theelectromagnets. or relays 47, 50, 53 and 56 to the pole, as describedbelow. For example, when the proper initial signal is received, relay 2is energized by the closing of contact 1 thereby moving all of itsmovable contacts to the left, and with relay 41 energized as explainedvabove thereby closing contacts 42 and 43, the circuit through relay 47is .as follows: 40 on the left, 43, relay 44, line 46, 68 on the left,relay 47 ,conductor 58?, 58, 33 to The relay 44'will then be energizedand opens at 45 the locking circuit of the relay 41'. The contacts 42and 43 of this latter relay are opened and the line 46 is disconnectedfrom the negative pole at 43.

During the silent period following the receiving of the first signal therelay 41 is again energized. These operations are repcated upon thereceiving of each signal and a short currentimpulse is sent through theline 46 at the. beginning of each signal. I

When the first impulse is sent the line 46 is connected through contact68 on the left hand side with the relav 47. This relay bej shortimpulses under-the control of the relay 44, the relay 50 does not nowbecome energized. It will be energized upon the. send ing of the nextimpulse. Relay 47v being locked up through contact 68 on the right handside to as a result of the first i'nipulse, and contact 49 now belngclosed, relay 50 will be energized by the following cir cuit: 40 on theleft, 43, relay 44, line 46, 49, conductor 49 51 onthe left, relay 50,conductor 58, 58,3810, The relay 50 illt-henlock a result o fi-thesecond; impulse tf fi llloivs z 51 on the right, l y. Q, flli l fll r 8,34. l- A? a result contact 52, wjil l close and prepare.

re ay 3, for e. hir mpul eby C nn c ing the relay 58with signal line 46.

Upon the sending of, the third, impulse,

any will, be energized by the. following.

circuit:l( 40fon the left, 43, relay 44, line 46, 52;. conductor 52%, 54on the left,

relfa is's, 53, 33,60 The'relay 53 will,

then look up, through its contact 54 on the right to At" san e t mecontact 65"kyil1fhe closedto prepare relay 56 for the,

fourth impulse by connecting the relay 56 to the signal line '45,through 55, conductor 57 oni the left, relay 56, conductor 58 58,3 3 to(Theltoiu th i npulsewill then energize relay 56, Wl 1ich w ill lockup'through ),"57 'onthe right, relay 56 conductor.

,8,, 33? 4+ :t It W'll be SBS L that such. arrangement mahespossible thesuccessive: operation o t;

' the electroinagnetsjor relays 47, 50, and

56in accordance with the arrival of the le- 11. der 9 i s r a were: peat on it is necessary that: the contactj68 be. closed as soon as theiela.47 o crates and that the C n act 49 e dined n a th nd of. the operationof said nelay. The same thing holds good also for relays'SO, 53 and 56and such adjustinents inay bereadily made in the contact springs.It'rnay happen that the,r,elay,44 opensthe locking circuit of relay 41too soon; adjustment of itscontactspring.

will then he requirech The contact 43 being;v

pene inf s pen e he uc e s ve. op ra;-

tion these two relays, the line46 will be current for a sufiicientlength of tirne to cause th BHQI'PDIHZQQQIL ot'one of the relays 47, 50,53 or 5 r In accordance withthe operation of relays 47, 50, '53 and 56,the restoring relay 23 is connected through the contacts 17, 18, 19 and20 either with the dot line 15 or with the paratus is adjusted, thecontacts'li', 18, 19 and 20 arenot traversed by current, Whereas if thesignal group received does not correone of the traversed-by currentwhereupon the relay 23 beco nes energized from the minus connectionassociated with relay 11, contact 12 eithec of contacts 7 throughcontacts 17, 18,

19, 20, through contact 24,through restoring y, ,-wr1us n pens in ente t58 the'circuit of the relays 47, 5Q, '53, 56 andv theserelays cannotoperate unless the Sig]- ls eceiired. belo to the c eep i 1 hi h theapparatusisjadjusted.

tlie'oneior' which the apparatus. i sse't is re;

ceivefd, (it being notedthat the figure illustrates the apparatus settor the signal Then, if the first iinpulse received is a: a shoutcurrent iinpulse will; besent,

through the circuit, 40fto the left, 48, relay-4 4, signal line 46, 68on',thelet, relay 47, conductorhS, 58, 3310 resulting in relay 4'7lockingiupa-t 68, to the right to,

(), and'closing, contact 17 -At thefsani'e tune, a short current impulseWillbe sent throughgthe circuit (f), contact, 7 to the,

right, 'd-ot-line15,'cQI1tact 1:7, conductor 17f, 18, conductor 18?, 19,conductor 19 20, relay 23 to This auses the en'ergization of relay 28,thus breaking the. circuit of'relay 47 at 58, and causingthc apparatustobe reset to its original setting. Now suppose that the first irnpulsecorrect, namely a, and the second, impulse is also a )7,

the latter being incorrect for the particular setting of the apparatus,then, a current impulse i-villbe senttln ough dash-line 15', contact 18to the right, conductor 18". 19to the ft) C nduc or 9%, Co tac 0,.thereby energizingrelay 23, which in turn breaksfthe circuits of delays47 and 50 at 58, thus restoring-the apparatus to its original setting.

Letus, assume that a, signal difieren t, than ,spond to the adjustmentof t-he appar'atus, above mentioned contacts is h f ey 231's Pro ded;With a ea contact 24; which holds it 11p f1f01 11 minus, tac ee'ntaq 24,rem in plus s soon as it receives an impulse and until; the slovvreleaserelay 2? becomes deenergized.

This slorvrrelease relay controls the duration of the silent scribed. Ir

7 Upon the energiz ationi of the controlling relay 8 a circuit is closedin, the contact 10 for the slow releaserelay 27 which. is provided forthe purpose of controlling theduperiods in a manner to b eederation ofthe silent periods separating the signals of one and'thesaine group, Inresponse toeach signal received the relay 27 becomes energized it thesignals received follow each other in, normal succession. i. e. if theduration the silent periodseparafl ing two consecutive signals is,shorter than eft me m rg n of he l w-act ng m gn riods between thesignals and before the v receiving-of the last signal (if they are toolong) cause the restoration of the apparatus.

If the signals received belong to the group for which the apparatus isadjusted and if the signals aresent in normal sequence i. e. if they areseparated by suit-able'silent periods, the relays 47, 50, '53 and 56will op,-

, erate in thenormal manner indicated above.

Two things may happen n'owz'either the group of signals received is theone for which the apparatus is adjusted or the group of'signals receivedcomprises one more signal than is required by the adjustment oftheapparatus. v

Inthe first case the group received will be followed bya longer silentperiod than the normal silent period separating the signals, the contact28 of the slow-release relay magnet 27 will return to normal and anenergizing circuit will be closed'through c011 ductor 29 and the contact22 for the ring ing 'relay31. Relay 31 closes contact 33 completing thecircuit of the call-bell S. At the same time, the relay 31locks upthrough contact34 to the minus pole until the apparatus is stopped,either by hand or by means ofa key 35. When the relay 31 operates, therelay2 is disconnected from the pole-in contact 33. F or this reason,the. signals that might be sent later on, will not be received untiltherelay 31 is returned to its'normal condition upon the actuation ofkey 35. p

The bell willriiig untilthe' key 35 is depressed, and during all thistime the signals do not actuate theapparatus.

Upon the energization of the ringing relay 31, the contact 33 alsodisconnects the positive pole from the common return leading to therelayse'i, 50, 53, 56 whereupon these relays become deenergized.

In the secondcase, if the group of signals received is followed byanother signal, the contact 21 being closed at this time, the restoringrelay will be energized at the beginning vof this additional signal andwill re store the apparatus to its normal position without causing theactuation of the bell. It will be seen therefore that the calling devicecannot be actuated by a group of signals composed of the same signals asthe group for which the apparatus is adjusted but comprising anadditional signal (dash or dot). In this manner, if the Morse code isused and the apparatus is adjusted for 2 ther incase of the letter S thedevice cannot be operated by the letter .B'(.. as

the restoring relay 23 is energized by the first signal (which is adash)and locks up through its contact 24 and the contact 28 of theslowrelease relay 27. The relays 47'. 50, 53 and 56 are restored tonormal until a suiliciently long silent period is produced.

It will be seen, therefore, that when an apparatus is adjusted forlacertain group of" the letter S ,itwill not respond to the signals, thecalling device does not respond unless the group is normally sent out,i. e.

signal and the periods for spacing the signals are not too long. In thismanner, the

so it is neither preceded or succeeded by any system adjusted for acertain group cannotbe'actua-ted by elements of other consecutivegr0ups. g e

The above description was given merely for the purpose ofexemplifying-the invention, the arrangement disclosed relating to agroup of signals correspondingtothe letter C .),of the Morse codeObviously, the apparatus may be subjectedto various modifications orsimplifications depending on the particular application desired. Thetype and construction of the relays or magnetsfis arbitrary, the mainthingbeing that these relays perform the functions disclosed.

The apparatus may be used to respond to call signals, such as groups ofletters in wireless telegraphy for ships or to respond to the SO Ssignal. In this case the num berofthecontacts 17 to 20 and relays 4C7 to56 will be increased to equal the total 1 number of signals formingthe'different lettersvof the call indication. i

. In the case of transmission over wires, the

apparatus may be simplified, whenever possible,by substituting in theplace of the I .Morse code, a code composed of groups coinpr-ismg aunlform number of signals. 1

A certain elasticity in the cadence of op- I eration may be obtained byproper adjustment-of the slow-release relays 11 and 27 in such a mannerthat, the contact 1 may be manually controlled. This elasticity may befurther increased if the relay 27, instead of controllingthe silentperiods between each I signal, is used for controlling the duration ofthe whole group (both impulse and si-j lence Under these conditions, themanipu- 1 lation may beirregular but the apparatus will respond as longas the signals forming v the group are sent out during a timedetermined' by the slow-release relay 2'7, irrespective of the cadenceof manipulation during this time. i

In addition to its use as a call selector, this apparatus may be usedalso as a selector for controlling distant mechanical functions or as atelephone or telegraph selector.

4, Lee

Having described my invention I declare. that what I claim is 1-, Incombination, a repeating relay, impulse, relays actuated thereby, one ofwhich elfects a time delay, a signal line connected with the otherimpulse relay, a series of character relays sequentially associated withthe signal line on successive impulses, dot, and dash lines associatedwith the firstim-, pulse relay, contacts controlled by the char acterrelays to connect the dot or dash line in predeterminedsequence, andmeans controlled by such connections to restore the character relayswhen operated out of; Se.- quence for which they are arranged.

2. In combination, a. repeating relay, impulse relays actuated thereby,one of which etiects atime delay, a signal line connected with the otherimpulse relay, a series of character relays sequentially associated withthe signal line on successive impulses, dot and dash lines associatedwith the first impulse relay and controlled by therepeating relay, andmeans controlled; by each character relay for sequentially completingthe dot and dash line circuits.

3 In combination, a repeating relay, impulse rel ys actuated thereby,one of which effects a time delay, a signal line connected with theother impulse relay, a series ofcharacter relays sequentially associatedwith the signal; line on successive impulses, dot, and dash linesassociated, with the first impulse relay, a restoring relay for openingthe circuits to the character relays, a space relay for rendering therestoring .relay inoperative, contacts controlled by the characterrelays for connecting the dot and dash line to the. restoring relay in apredetermined sequence whereby the restoring relay will nullity theeiiect of prior impulses on the character relays whenever an impulseout; of sequence occurs.

4. In combination, a repeating relay, iinpulse relays actuated t ereby,one ofwhich. effects a t me delay, a signal l ne connected with theother impulse relay, a series of character relays sequentiallyassociatedwith the signal; line on successive impulses, dot. and dashlines associated with the first impulse relay, a restoring relay foropening the circuits to the character'r-elays, a space relay forrendering the restoring relay inop- 'erative, contacts controlled by thecharacter relays for connecting the dot and dash line tothe restoringrelay ina predetermined sequence whereby the restoring relay willnullifythe etl'ect of prior impulses on the character relays whenever animpulse out of sequence occurs and the. space relay will nullity theefi'ect whenever improper spacmg occurs. r V

5. In a call selector, means responsive to received impulses, timingmeans tor determining the length of impulses received on the wasimpulseresponding means, a conductor and means whereby itis arranged tobe ener-- gized whenever an impulse is received by the responding means,two conductors and: means including the timing means whereby they. arearranged to be selectively euer- .Q'lZQCl according tothe lengtlrot thereceived impulses by the responding means. a plurality of relays andmeans whereby they are arranged: to be connected in sequence tosaidlirst conductor-on the receipt of successive impulses, meanscontrolled, by the last of said relays to prepare a call, circuit,predetermined connections between the two conductors and the successiverelays corresponding to the signal to which the selector is to respond,and means cont-rolled by said connections for prev nting; thepreparation. of the call circuit by said relays when. the receivedsignaldoes not correspond; with the sequence 0? connections. Y

6. A call selector having a call circuit adaptedto benenergized whensignal inn ductor and arranged to be energized sequentially only uponreceipt oi the signal in pulscs for which the selector is. adpisted,means associated. with the timing meansand.

.with the character'relays for nullifying the effect of prior impulseson the relays when other impulses areQreceIved on the responding means,and means controlled by the last of said relays to prepare the callcircuit for energizing an indicator.

7. In a call selector, means responsive to received impulses, timingmeans associated therewith for determining the length ofthe impulsesreceived on the impulse responding means, a plurality of line-conductorsand means whereby one of said conductors is arranged to be energizedwhenever an impulse is received. means including the time ing meanswhereby another of said conductors is arrangedto be energized wheneverthereceived impulse is a dot and means including thetiming means wherebythethird conductor is arranged to be energized whenever the receivedimpulseis a dash, a plurality ot'relays, the number of said relayscorresponding to the number of impulses in the call to be selected,means whereby said relays are arranged: to. be connected in sequence to.said first mentioned conductor on the receipt of successive impulses,means associated with the relays and with the dot and cashline-conductors in such manner that when a relay and either the dot orthe dash ill) line-conductor are simultaneously energized, the selectorwill return to normal, and means controlled by the last of said relaysfor preparing a circuit for energizing an indicatingdevice.

8. In a call selector adjusted to respond to desired signal impulses, incombination, means responsive to received impulses, timing meansassociated therewith for determining the length of impulses received onthe impulse responding means, a plurality of relays assiciated with theimpulse responding means energized in a predetermined sequence on thereceipt of desired signal impulses, means controlled by saidrelays andsaid timing means for restoring the selector to normal on the receptionof an undesired signal impulse, and means controlled by the last of saidrelays to prepare a circuit for energizing an indicator.

9. In a call selector adjusted to respond to desired signal impulses, incombination,

means responsive to received impulses, timing means associated therewithfor determining the length of impulses received on the impulseresponding means. plurality of relays associated with the impulserespondingmeans energized in a predetermined sequence on the receipt ofdesired signal impulses, means controlled by said relays and said timingmeans for restoring the selector to normal on the reception of anundesired signal impulse, means controlled by the last of said relays toprepare a circuit for energizing an indicator, and a second timing meansfor completing said circuit on the expiration of a predetermined silentperiod after the termination of the last impulse as received on theimpulse responding means in the sequence for which the selector is adjusted.

10. A call selector adjusted to respond to desired signal impulses,comprising means responsive to received signal impulses, a sig-' nalline conductor energized whenever an impulse is received through saidmeans, a plurality of relays associated with said signal line conductorand arranged to be energized in a predetermined sequence only upon thereception of the desired signal impulses,

- call circuit.

leasing relay associated with said signal responsive means for restoringthe system to normal at the expiration of a predetermined silent periodafter the termination of any signal impulse except the last impulse ofthe predetermined sequence, said slow releasing relay completing thecircuit for energizing the indicator at the expiration of apredetermined time after the termination of the predetermined sequenceof desired signal impulses. v

11. In a call selector for indicating the reception of certain desiredpredetermined signal impulses, in combination, means responsive toreceived signal impulses, a series of relays assoclated' with the signalresponsive means equal in number to the total number p of desired signalimpulses, means for consecutively energizing each of said relays uponthe reception of desired signal impulses in sequence, a call circuit,and means actuated by the last relay for closing the call circuit. I

12. In a call selector for indicating the reception of certain desiredpredetermined signal impulses, in combination, means responsive toreceived signal impulses, a series of character relays associated withthe signal responsive. means equal in number to the total number ofdesired signal impulses, means for consecutively closing acircuitthrough eachcha-racter relay upon the reception of desired signalimpulses, a call circuit and means actuated by the last character relayfor closing the call circuit, circuit breaking means associated with acommon portion of each character relay circuit, and means associatedwith each character relay for actuating the circuit breaking means uponthe reception of an undesired signal impulse, thus preventing theoperationot the LOUIS L. OHAUVEAU.

